Houghton and others (2013) suggest we might need to tweak that VEI scale to account for smaller explosive eruptions. However, we don't want to disrupt the definitions for VEI 1-8, so they suggest we ...

The scale goes from VEI-0 to VEI-8 and measures ash, lava, and rock ejected. VEI-1 is a gentle eruption that can happen frequently. Italy's Mt. Stromboli has been erupting almost continuously for ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week’s contribution is from Blaine McCleskey and David Roth, ...

Scientists have scales to measure the strength of natural phenomena like earthquakes and hurricanes. But what about the eruptive power of volcanoes? For that, geologists use the Volcanic Explosivity ...

An curved arrow pointing right. Following is a transcript of the video. Earth has had a dramatic history, filled with its share of angry outbursts. Here's how the largest volcanic eruptions measure up ...

Let's be blunt: we've reached a point where we need a new way to discuss and compare volcanic eruptions. Too many times do I run into articles talking about "supervolcanoes" and "mega-eruptions" and ...

The power of such eruptions is measured using the Volcanic Explosivity Index (VEI), which is a scale that goes from one to ...

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Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. An aerial view of the Grand Prismatic Spring in Yellowstone ...